Results 21 to 30 of about 7,607,900 (314)

On the characterization properties of certain hypergeometric functions in the open unit disk

open access: yesJournal of Inequalities and Applications, 2022
Our purpose in the present investigation is to study certain geometric properties such as the close-to-convexity, convexity, and starlikeness of the hypergeometric function z 1 F 2 ( a ; b , c ; z ) $z{}_{1}F_{2}(a;b,c;z)$ in the open unit disk.
Deepak Bansal   +3 more
doaj   +1 more source

A PDE Approach to the Problems of Optimality of Expectations

open access: yesInternational Journal of Analysis and Applications, 2023
Let (X, Z) be a bivariate random vector. A predictor of X based on Z is just a Borel function g(Z). The problem of "least squares prediction" of X given the observation Z is to find the global minimum point of the functional E[(X − g(Z))2] with respect ...
Mahir Hasanov
doaj   +1 more source

The Pan-STARRS1 z > 5.6 Quasar Survey. III. The z ≈ 6 Quasar Luminosity Function

open access: yesThe Astrophysical Journal, 2023
We present the z ≈ 6 type-1 quasar luminosity function (QLF), based on the Pan-STARRS1 (PS1) quasar survey. The PS1 sample includes 125 quasars at z ≈ 5.7–6.2, with −28 ≲ M _1450 ≲ −25.
Jan-Torge Schindler   +11 more
doaj   +1 more source

Subharmonicity properties of the Bergman kernel and some other functions associated to pseudoconvex domains [PDF]

open access: yes, 2005
Let $D$ be a pseudoconvex domain in $\C^k_t\times\Cn_z$ and let $\phi$ be a plurisubharmonic function in $D$. For each $t$ we consider the $n$-dimensional slice of $D$, $D_t=\{z; (t,z)\in D\}$, let $\phi^t$ be the restriction of $\phi$ to $D_t$ and ...
Berndtsson, Bo
core   +2 more sources

The 1/2--Complex Bruno function and the Yoccoz function. A numerical study of the Marmi--Moussa--Yoccoz Conjecture [PDF]

open access: yes, 2003
We study the 1/2--Complex Bruno function and we produce an algorithm to evaluate it numerically, giving a characterization of the monoid $\hat{\mathcal{M}}=\mathcal{M}_T\cup \mathcal{M}_S$.
Carletti, Timoteo
core   +3 more sources

$\mathcal Z$-distributive function lattices [PDF]

open access: yesMathematica Bohemica, 2013
For a non-empty space \(X\) and a non-trivial lattice \(Y\), some connections between properties of the poset \([X,Y]\) of all continuous functions \(X\to Y\) and properties of \(X\) and \(Y\) are well known. For instance, \([X,Y]\) is a continuous lattice if, and only if, both \(Y\) and \(\mathcal {O}X\) are continuous lattices.
openaire   +1 more source

The Univalent Function Created by the Meromorphic Functions Where Defined on the Period Lattice

open access: yesCommunications in Advanced Mathematical Sciences, 2019
The function $ \xi(z)$ is obtained from the logarithmic derivative function  $\sigma(z)$. The elliptic function $ \wp(z) $ is also derived from the $ \xi(z) $ function.
Hasan Sahin, İsmet Yıldız
doaj   +1 more source

Functions of the uvula and Z‐pharyngoplasty [PDF]

open access: yesPsychiatry and Clinical Neurosciences, 2000
AbstractUPPP includes uvulotomy. The uvula works as the pilot for eating and swallowing. We performed an operation which left the uvula intact and opened the pharynx by Z‐opening the palate, Z‐pharyngoplasty (ZPP). Twenty‐four patients were studied before and after ZPP. The results of the operations were satisfactory. No patients complained of symptoms
S, Mukai, C, Mukai, M, Nitta
openaire   +3 more sources

Measuring the Cosmological Geometry from the Lyman Alpha Forest along Parallel Lines of Sight [PDF]

open access: yes, 1998
We discuss the feasibility of measuring the cosmological metric using the redshift space correlation function of the Lya forest in multiple lines of sight, as a function of angular and velocity separation. The geometric parameter that is measured is f(z)
Ballinger W. E.   +7 more
core   +2 more sources

A characterization of pseudocompactness

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1981
It is proved here that a completely regular Hausdorff space X is pseudocompact if and only if for any continuous function f from X to a pseudocompact space (or a compact space) Y, f*ϕ is z-ultrafilter whenever ϕ is a z-ultrafilter on X.
Prabduh Ram Misra, Vinodkumar
doaj   +1 more source

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